A study on pressure loss mechanism in the inflow openings of cross-ventilation

Tomoyuki Endo; Takashi Kurabuchi; Masaaki Ohba; Yoshihiko Akamine

doi:10.3130/aije.82.1043

A study on pressure loss mechanism in the inflow openings of cross-ventilation

Tomoyuki Endo, Takashi Kurabuchi, Masaaki Ohba, Yoshihiko Akamine

Department of Architecture

Research output: Contribution to journal › Article › peer-review

Abstract

Pressure loss mechanism at the inflow opening of Cross-Ventilation is studied by detailed analysis of LES results. Manipulation of energy transfer equation through inflow openigs suggests that reduction of discharge coefficient should be originated from dynamic pressure in tangential direction and should be observed as increased static pressure at the opening. Analysis of virtual stream tube reveals that the static pressure at the opening is transferred to dynamic pressure as 'vena contracta' in part and the remaining static pressure is dissipated as generation of turbulent kinetic energy.

Original language	English
Pages (from-to)	1043-1050
Number of pages	8
Journal	Journal of Environmental Engineering (Japan)
Volume	82
Issue number	742
DOIs	https://doi.org/10.3130/aije.82.1043
Publication status	Published - Dec 2017

Keywords

Cwss-ventilatìon
LES
Local dynamic similarity model Discharge coefficient
Stream tiibe
Vena contracta

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10.3130/aije.82.1043

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abstract = "Pressure loss mechanism at the inflow opening of Cross-Ventilation is studied by detailed analysis of LES results. Manipulation of energy transfer equation through inflow openigs suggests that reduction of discharge coefficient should be originated from dynamic pressure in tangential direction and should be observed as increased static pressure at the opening. Analysis of virtual stream tube reveals that the static pressure at the opening is transferred to dynamic pressure as 'vena contracta' in part and the remaining static pressure is dissipated as generation of turbulent kinetic energy.",

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AU - Kurabuchi, Takashi

AU - Ohba, Masaaki

AU - Akamine, Yoshihiko

PY - 2017/12

Y1 - 2017/12

N2 - Pressure loss mechanism at the inflow opening of Cross-Ventilation is studied by detailed analysis of LES results. Manipulation of energy transfer equation through inflow openigs suggests that reduction of discharge coefficient should be originated from dynamic pressure in tangential direction and should be observed as increased static pressure at the opening. Analysis of virtual stream tube reveals that the static pressure at the opening is transferred to dynamic pressure as 'vena contracta' in part and the remaining static pressure is dissipated as generation of turbulent kinetic energy.

AB - Pressure loss mechanism at the inflow opening of Cross-Ventilation is studied by detailed analysis of LES results. Manipulation of energy transfer equation through inflow openigs suggests that reduction of discharge coefficient should be originated from dynamic pressure in tangential direction and should be observed as increased static pressure at the opening. Analysis of virtual stream tube reveals that the static pressure at the opening is transferred to dynamic pressure as 'vena contracta' in part and the remaining static pressure is dissipated as generation of turbulent kinetic energy.

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KW - LES

KW - Local dynamic similarity model Discharge coefficient

KW - Stream tiibe

KW - Vena contracta

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JO - Journal of Environmental Engineering (Japan)

JF - Journal of Environmental Engineering (Japan)

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ER -

A study on pressure loss mechanism in the inflow openings of cross-ventilation

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Keywords

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